KT-5C托卡马克离子温度及其涨落的实验研究

MEASUREMENT OF ION TEMPERATURE AND ITS FLUCTUATIONS IN THE KT 5C TOKAMAK

在ＫＴ－５Ｃ托卡马克上成功建立了一套静电离子探针（Ｋａｔｚｕｍａｔａ探针）诊断系统，测量了ＫＴ－５Ｃ托卡马克从芯部（５．５ｃｍ＜ｒ＜７．５ｃｍ）到边缘（７．５ｃｍ＜ｒ＜１１ｃｍ）的离子温度及其涨落。实验结果表明，在边缘等离子体离子温度高于电子温度，在芯部二者趋于一致。在我们的实验条件下，离子温度和电子温度的相对涨落量基本一致，而且都是电子密度相对涨落量大小的５０％。

An ion electrostatic probe (Katsumata probe) has been built on the KT 5C tokamak for the measurement of the ion temperature and its fluctuations.The profile of the ion temperatures and its fluctuations in KT 5C were measured from near the core to the edge region (5.5cm<r<11cm) for the first time with the ion electrostatic probe.The experimental results indicate that the gradient of the ion temperature is smaller than that of the electron temperature,and the ion temperature is higher than electron temperature in the edge region,suggesting that there exist interactions between the plasma and the wall.The relative temperature fluctuation of ion i /T i is roughly equal to that of electron e /T e and their amplitudes are about half of the electron density fluctuation e /n e .